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Statut |
Confirmé |
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Série |
LPTHE-PPH |
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Domaines |
hep-ph |
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Date |
Mardi 4 Avril 2023 |
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Heure |
14:00 |
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Institut |
LPTHE |
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Salle |
library & Zoom link in comments |
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Nom de l'orateur |
Hirschi |
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Prenom de l'orateur |
Valentin |
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Addresse email de l'orateur |
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Institution de l'orateur |
University of Bern |
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Titre |
Fully numerical perturbative QFT computations with Local Unitarity |
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Résumé |
It is well-known that perturbative expansions of QFT observable suffer from infrared (IR) divergences both
in the phase-space of real-emission contributions and in the loop amplitudes of virtual contributions.
Traditionally, the two are handled separately through a combination of local subtraction counterterm and
dimensional regulation. Local Unitarity is an alternative formulation using the Loop-Tree Duality (LTD)
theorem and where the Kinoshita–Lee–Nauenberg (KLN) cancellation pattern is leveraged to achieve a direct
cancellation of real-emission and loop IR divergences at the local level. Together with an automated local
renormalization procedure based on the R-operation, the resulting expression is locally finite and thus
amenable to numerical integration at arbitrary perturbative orders and for processes with final-state
singularities only. I will present an overview of the various ingredients entering that construction and the
challenges awaiting my new group at the University of Bern. |
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Numéro de preprint arXiv |
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Commentaires |
Join Zoom Meeting
https://cern.zoom.us/j/63419535770?pwd=WlpoNnF1M2xOY2cyM0tzSXZCdWFtQT09
Meeting ID: 634 1953 5770
Passcode: 387151 |
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Fichiers attachés |
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